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1 package alice.jungle.transaction;
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30
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2
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3 import java.io.IOException;
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4 import java.util.Iterator;
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5
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6 import alice.jungle.datasegment.store.operations.DefaultTreeOperationLogContainer;
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7
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8 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.core.Node;
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9 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeList;
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10 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.ChangeListWriter;
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11 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.persistent.Result;
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12 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.ChangeSet;
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13 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.TreeNode;
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14 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.impl.logger.TreeOperationLog;
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15 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.store.operations.TreeOperation;
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16 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference;
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17 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.AtomicReservableReference.Reservation;
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18 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultChangeSet;
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19 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.DefaultTreeContext;
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20 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TransactionManager;
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21 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.transaction.TreeContext;
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22 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultEither;
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23 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.DefaultError;
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24 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Either;
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25 import jp.ac.u_ryukyu.ie.cr.shoshi.jungle.util.Error;
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26
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27 public class NetworkTransactionManager<T extends TreeNode<T>> implements TransactionManager<T>
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28 {
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29
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30 private final AtomicReservableReference<TreeContext<T>> repository;
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31 private final TreeContext<T> tip;
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32 private final ChangeListWriter writer;
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33 private final String uuid;
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34 private final String treeName;
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35
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36 public NetworkTransactionManager(String _treeName, ChangeListWriter _writer,TreeContext<T> _tip,
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37 AtomicReservableReference<TreeContext<T>> _repository,String _uuid)
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30
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38 {
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39 repository = _repository;
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40 tip = _tip;
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41 writer = _writer;
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42 uuid = _uuid;
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43 treeName = _treeName;
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44 }
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45
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46 @Override
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47 public Either<Error, TransactionManager<T>> commit(T _newRoot,final TreeOperationLog _log) {
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48 ChangeSet cs = tip.getChangeSet();
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49 long currentRevision = cs.revision();
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50 long nextRevision = currentRevision + 1;
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51
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52 ChangeList list = new ChangeList() {
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53 @Override
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54 public Iterator<TreeOperation> iterator(){
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55 return _log.iterator();
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56 }
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57 };
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58
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59 Node root = _newRoot.getAsNode();
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60 DefaultChangeSet newCs = new DefaultChangeSet(root, cs, list, uuid, nextRevision);
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61 DefaultTreeContext<T> newContext = new DefaultTreeContext<T>(_newRoot,newCs);
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62
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63 @SuppressWarnings("rawtypes")
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64 Reservation reservation = repository.makeReservation(tip, newContext);
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65 if(reservation == null) {
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66 return DefaultEither.newA((Error)new DefaultError());
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67 }
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68 Result r = writer.write(list);
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69 if(r != Result.SUCCESS) {
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70 return DefaultEither.newA((Error)new DefaultError());
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71 }
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72 try {
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73 updateDataSegment(uuid, treeName, list);
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74 } catch (IOException e) {
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75 e.printStackTrace();
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76 }
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77 reservation.confirm();
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78 TransactionManager<T> txManager = new NetworkTransactionManager<T>(treeName, writer, newContext, repository, uuid);
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79 return DefaultEither.newB(txManager);
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80 }
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81
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82 private void updateDataSegment(String _uuid, String _treeName, Iterable<TreeOperation> _log) throws IOException {
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83 DefaultTreeOperationLogContainer container = new DefaultTreeOperationLogContainer();
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84 container.setTreeName(_treeName);
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85 container.setUUID(_uuid);
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86 container.unconvert(_log);
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87
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30
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88 }
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89
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90 @Override
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91 public long getRevision()
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92 {
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93 ChangeSet cs = tip.getChangeSet();
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94 return cs.revision();
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95 }
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96
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97 @Override
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98 public String getUUID() {
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99 return uuid;
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100 }
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101
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102 }
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